標題: | Characteristics of Conductive Polymer/Silicon Heterojunction Solar Cells with Periodic Nanostructures |
作者: | Huang, Yang-Yue Pan, Ward Lai, Yi-Chun Yang, T. T. Chen, Riqui Chirenjeevi, Krishnan Weng, Wei-Shen Yu, Peichen Meng, Hsin-Fei Charlton, Martin 光電工程學系 Department of Photonics |
關鍵字: | hybrid solar cell;silicon nanorods;damage removal etching |
公開日期: | 2013 |
摘要: | Mono- and multi-crystalline silicon photovoltaics currently still hold more than 80% market share because of the non-toxic, abundant material resources used, and their long-term stabilities. However, the cost of solar power is still more than three times that of fossil fuels, which necessitates a further reduction to accelerate its widespread use. It has been estimated that cell fabrication consumes 30% of the total manufacturing cost due to energy intensive semiconductor processes, such as high temperature furnace for doping, electrodes co-firing, high-vacuum chemical deposition, etc. Therefore, the organic-inorganic hybrid cell concept has been proposed to take advantage of the solution-based processes for rapid and low-cost production and the wide absorption spectrum of silicon. In this work, we demonstrate a hybrid heterojunction solar cell based on the structure of conductive polymer PEDOT:PSS spun cast on n-type crystalline silicon nanorod (SiNR) arrays with periodic arrangements. The nanorod arrays are fabricated by electron beam (E-beam) lithography followed by reactive-ion etching (RIE), which show capability to enhance light harvesting. In addition, SiNRs and PEDOT:PSS can form core-shell structure that provides a large p-n junction area for carrier separation and collection. We measured the optical and photovoltaic characteristics of these devices under a simulated class A solar simulator with a calibrated illumination intensity of 1000 W/m(2) for the AM1.5G solar spectrum. A post-RIE damage removal etching (DRE) is subsequently introduced in order to mitigate the surface recombination issues and also alter the surface reflection due to modifications in the nanorod side-wall profile. Finally, we show that the DRE treatment can effectively recover the carrier lifetime and dark current-voltage characteristics of SiNRs hybrid solar cells to resemble the planar counterpart without RIE damages. |
URI: | http://hdl.handle.net/11536/25003 |
ISBN: | 978-1-4799-3299-3 |
ISSN: | 0160-8371 |
期刊: | 2013 IEEE 39TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC) |
起始頁: | 1028 |
結束頁: | 1030 |
顯示於類別: | 會議論文 |